Pump-cylinder for water-lifts.



PATENTED AUG. 6,. 1907. L. G. LEWIS. Y

PUMP CYLINDER FOR WATER LIFTS.

APPLICATION FILED JAN. 5. 190 6.

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PATENTED AUG. 6, 1907.

L. G. LEWIS.

PUMP CYLINDER FOR WATER LIFTS.

APPLICATION FILED JAN. 5. 1906.

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INVENTOR Zea/16 6. Zeta/Ir n "mam; PETERS c0, wnsmzvarau, n. c.

No. 862,489. PATENTED AUG. 6, 1907. L. c. LEWIS. PUMP GYLINDBRVPOR WATERLIFTS.

APPLICATION TILED JAN. 5| 1906.

3 SHEETS-SHEET 3.

ATTORNEYS LEWIS C. LEWIS, OF COLUMBUS, OHIO,

COMPANY, OF COLUMBUS, OHIO,

ASSIGNOR TO THE MONARGH MANUFACTURING A CORPORATION OF OHIO.

PUMP-CYLINDER FOR WATER-LIFTS.

Specification of Letters Patent.

Patented Aug. 6, 1907.

Application filed January 5,1906. Serial No. 294,697.-

To all whom it may concern:

Be it known that l, LEwIs O. LEWIS, a citizen of the United States,residing at Columbus, in the county of Franklin and State of Ohio, haveinvented certain new and useful lmprovements in Pump-Cylinders forWater-Lifts, of which the following is a specification.

My invention relates to new and useful improvements in pump cylindersfor water lifts and more particularly to the valve mechanism.

The object of the invention is to provide a quick acting valve mechanismof simple construction which will prevent back pressure and obviatecreeping of the piston head when the pump is not in use.

Another object of the invention is to provide a device of the characterdescribed that will be strong, durable and efficient and one in whichthe several parts will not be liable to get out of working order.

With the above and other objects in view, the invention consists of thenovel details of construction and operation, a preferable embodiment ofwhich is described in the specification and illustrated in theaccompanying drawings, wherein:

Figure 1 is a longitudinal vertical sectional view of the pump cylinderand valve mechanism, illustrating the position of the valves during theinward stroke of the piston. Fig. 2 is a like view illustrating theposition of the valves during the outward stroke of the piston. Fig. 3is a transverse vertical sectional view taken on the line .r it? of Fig.1, and, Fig. 4 is a longil l rounds the valve stems and tends to spreadthe leathers tudinal vertical sectional view of the pump and valvemechanism, showing the parts in their initial position before thepumping operation is begun and illustrating in dotted lines the positionof the parts during the initial stroke of the piston head.

In the drawings, the numeral 1 designates the pump cylinder which isclosed at its inner end by a cap 2, through which passes the piston rod3 carrying on its end a suitable piston head 4. A cylindrical valvecasing 5 is screwed on the outer end of the pump cylinder l and isitself closed at its outer end by a cap (3 screw threaded thereon.

The valve casing is divided by vertical walls 7 one of which abuts theouter end of the cylinder 1. The walls 7 are separated and provide achamber therebetween which is divided centrally by a transversepartition 8 preferably formed integral with the walls 7. The chamber isthus divided into an upper chamber 9 and a lower chamber l0 more clearlyillustrated in Fig. 3. Between the walls 7 the valve casing 5 isprovided on opposite sides or above and below with an outlet nipple 11and an inlet nipple 12, the said nipple 11 communicating with the upperchamber 9 and the nipple 12 communicating with the lower chamber 10.'lhrough the walls 7 and the upper chamber 9 an elongated valve sleeve13 is passed and secured, the said valve sleeve projecting some distanceon each side of the walls, while through the walls and the lower chamber10 a similar valve sleeve 1.4 is arranged in a like manner. The sleevesat each end carry caps l5, l6, l7 and 18 each having enlarged centralopenings as shown in the drawings; the openings, however, are smaller indiameter than the inner bore of each of the sleeves so as to retain thevalves hereinafter described therein.

The upper sleeve 13 is provided with three annular rows of ports 19, 20and 2]. respectively, all of said ports being located in the sleevebetween the walls 7 and having communication with the upper chamber 9.The lower valve sleeve 14 is provided with a central annular row ofports 22 located between the walls 7 and having communication with thelower chamber 10. Like ports 23 and 24 are provided in the sleeve justoutside of the walls 7, the ports 23 communicating with the pumpcylinder 1 and the ports 24 communieating with the valve casing betweenthe cap 6 and the outermost wall 7 Within the sleeves I provide doublevalves 25 and 26, each of said valves being composed of double cupleathers 27 and 28 suitably secured together and fitted to slide snuglyin the sleeves. The leathers 28 each carry a hollow stem 29 whichprojects towards and receives a solid stem 30 projecting from the cupleather 27, so that the leathers may move toward each other by atelescoping of the valve stems. The valve 26 comprises a coiled spring31 which surapart; while at each end of the lower valve sleeve 14-conical springs 32 are provided which when cornpressed by either of thecup leathers, tend to assist in the shifting of the valve 26 as will behereinafter described.

Communication is established between the valve casing and the pumpcylinder near its inner end by a passage 33 formed in a longitudinalenlargement 34 provided along one side of the cylinder. This passageenters the valve casing adjacent the outermost wall 7 and between thesaid wall and the cap 6.

I will now proceed to describe the operation of my pump and valvemechanism.

The piston rod 3 having been attached to a water motor or otheroperating means and the nipple 12 connected to a pipe leading from thesource of supply from which the water is to be pumped, we will supposethat the parts are in the position shown in Fig. 4. It is of course tobe understood that when the pump is first installed there is no water inthe cylinder or any of the chambers, but in lieu thereof air which isforced out on the first inward and outward strokes of the piston head.Referring to Fig. 4, it will be apparent that the first stroke of thepiston head 4 is the inward stroke and as the head moves inward, thesuction created draws the cylinder as described.

the cup leather 28 away from the cup leather 27 and over and past theports 23, where it engages with the spring 32 and compresses the same.After the cup leather passes the ports 23, the continued movement of thepiston h cad draws in water through the nipple 12 into the chamber 10through the ports 22 into the valve casing 14 between the cup leathers27 and 28 and out through the ports .23 into the pump cylinder. in thismanner the chamber 10 is filled with water as is also the pump cylinder1 between the piston head 4 and the innermost wall 7. During thismovement the cup leather 27 has remained in its original position owingto the telescoping valve stems and the suction created on the cupleather 28 of the upper valve 25 tends to hold it in position. However,during this inward stroke of the piston head, the air lying between thesaid head and the inner cap 2 is forced out through the passage 33 tothe valve casing 5 and into the valve sleeve 1.3. The pressure of theair against the cup leather 27 of the valve 25 forces the same inward,compressing the spring 3] and telescoping the valve stems until the saidcup leather passes the ports 21 and the air passes out therethrough intothe chamber 9 and escapes through the outlet nipple 11. By thisarrangement when the piston head reaches the end of its inward stroke,practi cally all the air carried before it has been forced from When thepiston head reaches the end of its stroke, the pressure is relieved onthe cup leather 27 which is returned to its original position by theexpanding of the spring 31. The piston head immediately begins itsoutward stroke and forces the water which has been drawn in as describedagainst the cup leathers 28 of the valves 25 and 26. The spring 32 whichhas been compressed as shown in Fig. 1, will assist in moving the cupleather 28 of the valve 26 inward, so that the cup leathers 28 and 27 ofthe said valve are forced back and both moved to the position shown inFig. 2, the cup leather 27 compressing the spring 32. By observing thesaid figure, it will be seen that communication between the ports 23 and22 is interrupted by the cup leather 27 which stands therebetween, whilecommunication has been established between the ports 22, the ports 24and the valve casing, the said cup leather 27 having been moved beyondthe ports 24. Also the pressure of the water against the cup leather 28of. the valve 25 has forced the same inward, so that the spring 31 iscompressed and communication established between the cylinder 1, theport 19 and the upper chamber 9, the cup leathers standing on each sideof the ports 21 and cutting off communication between the same and thevalve casing. The valve in this position the water is forced into thesleeve 13 and the chamber 9 by way of the ports 19 and finally passesout through the outlet nipple 11 which is connected to the pipe leadingto the tank or other destination. Some of the water which passes intothe chamber 9 also passes through the port 21 into the sleeve 13 betweenthe cup leathers, thus causing a solid body of water to standtherebetween. This of course only happens on the first inward stroke ofthe piston and should the cup leathers for any reason cover the ports21, the water will enter therebetween to the ports 20. While thisoperation has been going on the piston has been drawing water from thechamber 10 through the ports 241 into the valve casing 5 and by way of.the passage 33 to the cylinder 1 between the piston head and the cap 2.Any air standing between the piston head 4 and the wall 7 will be forcedout through the ports lS) with the water, and thus by the first twostrokes of the piston head, the pump cylinder and valve casing arepractically freed thereof. The parts remain in this positionuntil thepiston reaches the end of its outward stroke. It will be observed thatwater now stands between the cup leathers and on each side thereof sothat the spring 31 is held in its compressed state and the valvesmaintained in their relative positions throughout the operation of thepump. When the piston head starts on its inward stroke, the suctiontogether with the expansion of the compressed spring 32 shifts the lowervalve 26 so that the cup leather 27 covers the ports 24. The waterentering the valve sleeve 14 from the valve casing through the open cap18 moves the valve to the position shown in Fig. 1., so that the ports23 are opened and the piston head is permitted to draw water into thepump casing 1 as during the first stroke. The water which is enteringthe valve casing 5 by way of the passage 33 besides shifting the lowervalve26 e11- ters the upper valve sleeve 13 through the cap 16 andforces the valve 25 over beyond the ports 21 to the position shown inFig. 1. The said ports 21 thus being opened, permit the water to passinto the chamber 9 and out through the nipple 11 communication betweenthe pump cylinder and the ports 19 being cut off by the cup leather 28.When the valve head reaches the end of its inward stroke, the valves areagain shifted and so on throughout the operation of the pump.

- It is to be noted that while I have designated the cylinder 1 andvalve casing 5 as separate parts, and specified the walls 7 as beingformed in the valve casing, the cylinder 1 and the valve casing o couldbe formed in one piece and the entire structure termed a cylinder, sothat the walls 7 would divide the same into two parts, the same standingon each side of the upper and lower chambers 9 and 10. However, it hasbeen found that the construction set forth in the drawings is morepractical.

What I claim, is:

1. In a pump cylinder for water lifts, a piston head working in thecylinder, provision for establishing an up per and a lower chamberwithin the cylinder and dividing the cylinder into two parts, provisionfor establishing com munication between the parts of the cylinder oneach side of the chambers independent of said chambers, provision forconducting water to the lower chamber and conducting water from theupper chamber, a valve sleeve extending through the upper chamber andhaving ports communicating therewith, a valve sleeve extending throughthe lower chamber having a plurality of ports, some communicating withthe lower chamber and others communicating with the parts of thecylinder on each side of the chamber, a valve working in the uppersleeve and coacting with the ports thereof. to alternately cut off andestablish communication with the upper chamber and the cylinder on eachside thereof, and a valve working in the lower sleeve and coacting withthe ports thereof to alternately cut off and establish communicationbetween the lower chamber and the parts of the cylinder on each sidethereof.

2. 111 a pump cylinder for Water lifts, a piston head working in thecylinder, provision for establishing an upper and a lower chamber withinthe cylinder and dividing the cylinder into two parts, provision forestablishing com munication between the parts of the r vlinder on eachside of the chamber independent of said chambers, provision forconducting water to the lower chamber and for conducting water from theupper chamber, a valve sleeve extending through the upper chamber andhaving; ports communicating therewith, a valve sleeve extending throughthe lower chamber having a, plurality of ports, some communicating withthe lower chamber and others communicating with the parts of thecylinder on each side of the chamber, a valve working in the uppersleeve and coacting with the ports thereof to alternately cut oil andestablish communication with the upper chamber and the cylinder on eachside thereof. a valve working in the lower sleeve and c0- acting' withthe ports thereof to alternately cut oil? and In testimony whereof Iaffix my signature in presence of 15 two witnesses.

LEWIS C. LEWI S.

Witness s a A. L. PHELPS, M. 15. Scum).

